The Windows Filtering PLatform has blocked a packet


  • Hi

    I have a number of Windows Server 2008 R2 servers in a single domain. I have created a firewall rule which opens TCP port 13724 on all servers including the domain controllers. I'm able to telnet to port 13724 on all servers apart from the domain controllers, where I get the following message returned.

    C:\Windows\system32>telnet server1 13724 Connecting To Server1...Could not open connection to the host, on port 13724:
     Connect failed

    When I examine the security event log on the destination domain controller, I see the following event.

    The Windows Filtering Platform has blocked a packet.

    Application Information:

    Process ID: 0

    Application Name: -

    Network Information:

    Direction: Inbound

    Source Address:

    Source Port: 56112

    Destination Address:

    Destination Port: 13724

    Protocol: 6

    Filter Information:

    Filter Run-Time ID: 72708

    Layer Name: Transport

    Layer Run-Time ID: 1

    Any help appreciated.


    • Edited by JustinLa Monday, May 28, 2012 2:39 PM edit
    Monday, May 28, 2012 2:33 PM


  • Hi,

    This issue may be caused by incorrect Firewall settings or conflicts of software. Let’s try to disable Windows Firewall to test.

    Click Start, type CMD, type the following command, press Enter.

    Netsh advfirewall set allprofiles state off

    If the issue doesn’t appear, please try to configure your Windows Firewall based on your environment and Network infrastructure.

    If the issue still occurs, let’s test in Clean Boot.

    Click start, type MSCONFIG, press Enter. Switch to Services tab, click Hide all Microsoft Services, click Disable all. Switch to Startup tab, click Disable all. Click OK to restart.



    Hope this helps!

    Best Regards
    Elytis Cheng

    Elytis Cheng

    TechNet Community Support

    Tuesday, May 29, 2012 2:20 AM